On 03/03/13 15:32, Ian MacArthur wrote:
> Here's the sample code; it turned out longer than I initially thought...
Here's a small diff to Ian's code that draws an actual g-clef
into the staff using a hard coded 1 byte-per-pixel image of
a g clef.. screenshot:
http://seriss.com/people/erco/fltk/tmp/g-clef-app-snapshot.png
In addition to the below diff, you need the following g_clef.h file:
http://seriss.com/people/erco/fltk/tmp/g_clef.h
The include file (an image of a g-clef as C++ code in hex)
was created with these steps:
1) gimp to grab an image of a g clef from the web
2) scale it to size needed by the app
3) save it as a grayscale png
4) dumped it as hex using this app from my cheat page:
http://seriss.com/people/erco/fltk/#Fl_PNG_Hex_Dump
The output of that app is the contents of the .h file
Here's the diff for Ian's code to enable this g clef image:
--- foo-orig.cxx 2013-03-03 16:47:49.000000000 -0800
+++ foo.cxx 2013-03-03 16:45:18.000000000 -0800
@@ -1,3 +1,4 @@
+
//
// Test demo - draw a staff
//
@@ -14,6 +15,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
+#include "g_clef.h"
// some widgets we will use...
static Fl_Double_Window *main_win = 0;
@@ -41,7 +43,6 @@
};
void staff_view::draw() {
- static char clef[2] = {'G', 0}; // a G clef... sort of...
Fl_Box::draw(); // draw the base-class box first to give us an outline
to fill...
// determine some limits for us to daw of staff lines into
@@ -55,6 +56,9 @@
int gap = 15; // space between the lines...
int ht = gap * 4; // 5 lines, 4 gaps...
+ // draw the G clef
+ fl_draw_image(g_clef_img,xo,yo-18,43,108,1);
+
fl_color(FL_BLACK); // set the colour first
fl_line_style(FL_SOLID, 2); // then set the line style
@@ -73,14 +77,6 @@
yl += gap;
}
- // draw the clef; A big letter G here...
- fl_font(FL_TIMES, ht);
- // measure the clef symbol, so we can figure out where to draw it...
- int dx, dy, cw, ch;
- fl_text_extents(clef, dx, dy, cw, ch);
- int y_nudge = (ht - ch) / 2; // roughly centre the G in the staff -
wrong, but looks OK...
- fl_draw(clef, xo + dx, yo + ht + dy + ch - y_nudge);
-
// draw the note... I really ought to do this better, but for now, just
draw
// a filled ellipse and pretend it is a breve...!
int note_width = (int)(gap * 1.4);
@@ -169,12 +165,12 @@
repeat_bt->callback((Fl_Callback*)cb_repeat_bt);
// shows the staff
- staff = new staff_view(10, 104, 380, 100);
+ staff = new staff_view(10, 80, 380, 120);
staff->box(FL_THIN_DOWN_BOX);
staff->color(FL_BACKGROUND2_COLOR);
// show the "instructions" text
- Fl_Box* instructions = new Fl_Box(20, 14, 365, 67, "Click on the note
name below");
+ Fl_Box* instructions = new Fl_Box(20, 14, 365, 50, "Click on the note
name below");
instructions->box(FL_FLAT_BOX);
// make a set of note-name buttons here...
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